问获取包含内部异常的完整字符串堆栈跟踪

EN

public static String joinStackTrace(Throwable e) {
    StringWriter writer = null;
    try {
        writer = new StringWriter();
        joinStackTrace(e, writer);
        return writer.toString();
    }
    finally {
        if (writer != null)
            try {
                writer.close();
            } catch (IOException e1) {
                // ignore
            }
    }
}

public static void joinStackTrace(Throwable e, StringWriter writer) {
    PrintWriter printer = null;
    try {
        printer = new PrintWriter(writer);

        while (e != null) {

            printer.println(e);
            StackTraceElement[] trace = e.getStackTrace();
            for (int i = 0; i < trace.length; i++)
                printer.println("\tat " + trace[i]);

            e = e.getCause();
            if (e != null)
                printer.println("Caused by:\r\n");
        }
    }
    finally {
        if (printer != null)
            printer.close();
    }
}